window.onload = function () {
	// var alink = document.querySelect(".alink");
	var alink = document.getElementsByClassName("alink")[0];
	alink.onclick = function(){
		alert("别瞎点，没用的");
	};
	
	var ti3 = document.querySelector('#ti3');
	console.log(ti3);
	ti3.addEventListener('click',function(){
		alert("hello git");
	});
}